.upload {
  box-shadow: 0 0 2px 2px #ccc;
  border-radius: 20px;
  height: 300px;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: background-color 1s;
  &.active {
    background-color: rgba($color: skyblue, $alpha: 0.3);
  }
}
